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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $109,176,000 | 612,140,346 | 612,140,346 |
| 2006 | $136,185,000 | 763,577,462 | 763,577,462 |
| 2007 | $252,249,000 | 1,347,759,387 | 1,347,759,387 |
| 2008 | $561,102,000 | 2,057,257,851 | 2,057,257,851 |
| 2009 | $105,384,000 | 545,939,505 | 545,939,505 |
| 2010 | $253,267,000 | 916,367,360 | 916,367,360 |
| 2011 | $303,369,000 | 787,154,130 | 787,154,130 |
Note: Quantity represents Weight in kilograms
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